refactor racing use cases

core/racing/application/use-cases/GetTotalLeaguesUseCase.ts

@@ -1,25 +1,41 @@
 import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
-import type { GetTotalLeaguesOutputPort } from '../ports/output/GetTotalLeaguesOutputPort';
 import { Result } from '@core/shared/application/Result';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
-import type { AsyncUseCase , Logger } from '@core/shared/application';
+import type { UseCaseOutputPort } from '@core/shared/application';
 
-export class GetTotalLeaguesUseCase implements AsyncUseCase<void, GetTotalLeaguesOutputPort, 'REPOSITORY_ERROR'>
-{
+export type GetTotalLeaguesInput = {};
+
+export type GetTotalLeaguesResult = {
+  totalLeagues: number;
+};
+
+export type GetTotalLeaguesErrorCode = 'REPOSITORY_ERROR';
+
+export class GetTotalLeaguesUseCase {
   constructor(
     private readonly leagueRepository: ILeagueRepository,
-    private readonly logger: Logger,
+    private readonly output: UseCaseOutputPort<GetTotalLeaguesResult>,
   ) {}
 
-  async execute(): Promise<Result<GetTotalLeaguesOutputPort, ApplicationErrorCode<'REPOSITORY_ERROR'>>> {
+  async execute(
+    _input: GetTotalLeaguesInput,
+  ): Promise<Result<void, ApplicationErrorCode<GetTotalLeaguesErrorCode, { message: string }>>> {
     try {
       const leagues = await this.leagueRepository.findAll();
-      const output: GetTotalLeaguesOutputPort = { totalLeagues: leagues.length };
+      const result: GetTotalLeaguesResult = { totalLeagues: leagues.length };
 
-      return Result.ok(output);
-    } catch (error) {
-      this.logger.error('Error retrieving total leagues', error as Error);
-      return Result.err({ code: 'REPOSITORY_ERROR', details: { message: 'Failed to retrieve total leagues' } });
+      this.output.present(result);
+
+      return Result.ok(undefined);
+    } catch (err) {
+      const error = err as { message?: string } | undefined;
+
+      return Result.err({
+        code: 'REPOSITORY_ERROR',
+        details: {
+          message: error?.message ?? 'Failed to compute total leagues',
+        },
+      });
     }
   }
 }